- 您现在的位置：买卖IC网 > PDF目录16076 > IPR-NCO (Altera)IP NCO COMPILER RENEW PDF资料下载
参数资料
| 型号： | IPR-NCO |
| 厂商： | Altera |
| 文件页数： | 37/54页 |
| 文件大小： | 0K |
| 描述： | IP NCO COMPILER RENEW |
| 标准包装： | 1 |
| 系列： | * |
| 类型： | MegaCore |
| 功能： | 数控振荡器编译器 |
| 许可证： | 续用许可证 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页当前第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页
Chapter 4: Functional Description
4–5
Functional Description
cosine waveforms. All other output values are derived from these values based on the
position of the rotating phasor on the unit circle as shown in Table 4–1 and Figure 4–2 .
Table 4–1. Derivation of Output Values
Position in Unit Circle
1
2
3
4
5
6
7
8
Range for Phase x
0 <= x < p/4
p/4 <= x < p/2
p/2 <= x < 3p/4
3p/4 <= x < p
p <= x < 5p/4
5p/4 <= x < 3p/2
3p/2 <= x < 7p/4
7p/4 <= x < 2p
sin(x)
sin(x)
cos(p/4x)
cos(x-p/2)
sin(p-x)
-sin(x-p)
-cos(3p/2-x)
-cos(x-3p/2)
-sin(2p-x)
cos(x)
cos(x)
sin(p/2-x)
-sin(x-p/2)
-cos(p-x)
-cos(x-p)
-sin(3p/2-x)
sin(x-3p/2)
cos(2p-x)
Because a small ROM implementation is more likely to have periodic value repetition,
the resulting waveform’s SFDR is lower than that of the large ROM architecture.
However, you can often mitigate this reduction in SFDR by using phase dithering. For
information about this option, refer to “Phase Dithering” on page 4–8 .
Figure 4–2. Derivation of output Values
CORDIC Architecture
The CORDIC algorithm, which can calculate trigonometric functions such as sine and
cosine, provides a high-performance solution for very-high precision oscillators in
systems where internal memory is at a premium.
The CORDIC algorithm is based on the concept of complex phasor rotation by
multiplication of the phase angle by successively smaller constants. In digital
hardware, the multiplication is by powers of two only. Therefore, the algorithm can be
implemented efficiently by a series of simple binary shift and additions/subtractions.
November 2013
Altera Corporation
NCO MegaCore Function
User Guide
相关PDF资料 |
PDF描述 |
|---|---|
| EMM06DRMT-S288 | CONN EDGECARD 12POS .156 EXTEND |
| VLCF4024T-470MR44-2 | INDUCTOR POWER 47UH 0.44A SMD |
| RP10-483.3SE/N | CONV DC/DC 10W 36-75VIN 3.3VOUT |
| M3YYK-2606R | IDC CABLE - MPD26K/MC26M/MPD26K |
| M3RRK-2606R | IDC CABLE - MPR26K/MC26M/MPR26K |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IPR-NIOS | 功能描述:开发软件 Nios II MegaCore RENEWAL RoHS:否 制造商:Atollic Inc. 产品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors |
| IPROBER 520 | 制造商:TTi-Thurlby Thandar Instruments 功能描述:Bulk 制造商:Aim & Thurlby Thandar Instruments 功能描述:PROBE, CURRENT, POSITIONAL, ON PCB TRACK 制造商:Aim & Thurlby Thandar Instruments 功能描述:PROBE, CURRENT, 5MHZ, 2M; Test Probe Ratio:-; Connector Type A:-; Connector Type B:-; Lead Length:2m; Bandwidth:5MHz; SVHC:No SVHC (19-Dec-2012) ;RoHS Compliant: NA |
| IPR-PCI/MT32 | 功能描述:开发软件 PCI 32b MasterTarget MegaCore RENEWAL RoHS:否 制造商:Atollic Inc. 产品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors |
| IPR-PCI/MT64 | 功能描述:开发软件 PCI 64b MasterTarget MegaCore RENEWAL RoHS:否 制造商:Atollic Inc. 产品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors |
| IPR-PCI/T32 | 功能描述:开发软件 PCI 32-bit Target MegaCore RENEWAL RoHS:否 制造商:Atollic Inc. 产品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors |
发布紧急采购，3分钟左右您将得到回复。